not that difficult typical hirevue questions generally average types like why jp morgan chase tell me about yourself teamwork stuff 2 mins recording time and retake option so no stress at all
One hirevue- very focused on behavioural and why questions. Eg why jp Morgan. There is no formal interview stage after the hirevue, you go straight from hv to offer(normally comes out in December)
after submitting cv and cl i a did hirevue interview and i spent a lot of time practising and stressing about pracitsing, i think i ended up sending it too late and i dont think it went very well since it was my first one